23 Example for NCDOT Mod BT-74 bridge girders Cost premium for sand LWC in girder - Assume $30 / CY = $6.83 / LF - Cost premium for LWC for 150 ft girder = $1,024 Cost reduction by using sand LWC girder - Shipping from plant to site = $811 NWC girder = 69 t; LWC girder = 58 t, or 11 t less - Drop 4 strands / girder @ $0.65 / LF ea.
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